mount.c revision 113220
1/*- 2 * Copyright (c) 1980, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41#if 0 42static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 43#endif 44static const char rcsid[] = 45 "$FreeBSD: head/sbin/mount/mount.c 113220 2003-04-07 12:56:01Z mdodd $"; 46#endif /* not lint */ 47 48#include <sys/param.h> 49#include <sys/mount.h> 50#include <sys/stat.h> 51#include <sys/wait.h> 52 53#include <ctype.h> 54#include <err.h> 55#include <errno.h> 56#include <fstab.h> 57#include <pwd.h> 58#include <signal.h> 59#include <stdio.h> 60#include <stdlib.h> 61#include <string.h> 62#include <unistd.h> 63 64#include "extern.h" 65#include "mntopts.h" 66#include "pathnames.h" 67 68/* `meta' options */ 69#define MOUNT_META_OPTION_FSTAB "fstab" 70#define MOUNT_META_OPTION_CURRENT "current" 71 72int debug, fstab_style, verbose; 73 74char *catopt(char *, const char *); 75struct statfs *getmntpt(const char *); 76int hasopt(const char *, const char *); 77int ismounted(struct fstab *, struct statfs *, int); 78int isremountable(const char *); 79void mangle(char *, int *, const char **); 80char *update_options(char *, char *, int); 81int mountfs(const char *, const char *, const char *, 82 int, const char *, const char *); 83void remopt(char *, const char *); 84void prmount(struct statfs *); 85void putfsent(const struct statfs *); 86void usage(void); 87char *flags2opts(int); 88 89/* Map from mount options to printable formats. */ 90static struct opt { 91 int o_opt; 92 const char *o_name; 93} optnames[] = { 94 { MNT_ASYNC, "asynchronous" }, 95 { MNT_EXPORTED, "NFS exported" }, 96 { MNT_LOCAL, "local" }, 97 { MNT_NOATIME, "noatime" }, 98 { MNT_NODEV, "nodev" }, 99 { MNT_NOEXEC, "noexec" }, 100 { MNT_NOSUID, "nosuid" }, 101 { MNT_NOSYMFOLLOW, "nosymfollow" }, 102 { MNT_QUOTA, "with quotas" }, 103 { MNT_RDONLY, "read-only" }, 104 { MNT_SYNCHRONOUS, "synchronous" }, 105 { MNT_UNION, "union" }, 106 { MNT_NOCLUSTERR, "noclusterr" }, 107 { MNT_NOCLUSTERW, "noclusterw" }, 108 { MNT_SUIDDIR, "suiddir" }, 109 { MNT_SOFTDEP, "soft-updates" }, 110 { MNT_MULTILABEL, "multilabel" }, 111 { MNT_ACLS, "acls" }, 112 { 0, NULL } 113}; 114 115/* 116 * List of VFS types that can be remounted without becoming mounted on top 117 * of each other. 118 * XXX Is this list correct? 119 */ 120static const char * 121remountable_fs_names[] = { 122 "ufs", "ffs", "ext2fs", 123 0 124}; 125 126int 127main(argc, argv) 128 int argc; 129 char * const argv[]; 130{ 131 const char *mntfromname, **vfslist, *vfstype; 132 struct fstab *fs; 133 struct statfs *mntbuf; 134 FILE *mountdfp; 135 pid_t pid; 136 int all, ch, i, init_flags, mntsize, rval, have_fstab; 137 char *cp, *ep, *options; 138 139 all = init_flags = 0; 140 options = NULL; 141 vfslist = NULL; 142 vfstype = "ufs"; 143 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) 144 switch (ch) { 145 case 'a': 146 all = 1; 147 break; 148 case 'd': 149 debug = 1; 150 break; 151 case 'F': 152 setfstab(optarg); 153 break; 154 case 'f': 155 init_flags |= MNT_FORCE; 156 break; 157 case 'o': 158 if (*optarg) 159 options = catopt(options, optarg); 160 break; 161 case 'p': 162 fstab_style = 1; 163 verbose = 1; 164 break; 165 case 'r': 166 options = catopt(options, "ro"); 167 break; 168 case 't': 169 if (vfslist != NULL) 170 errx(1, "only one -t option may be specified"); 171 vfslist = makevfslist(optarg); 172 vfstype = optarg; 173 break; 174 case 'u': 175 init_flags |= MNT_UPDATE; 176 break; 177 case 'v': 178 verbose = 1; 179 break; 180 case 'w': 181 options = catopt(options, "noro"); 182 break; 183 case '?': 184 default: 185 usage(); 186 /* NOTREACHED */ 187 } 188 argc -= optind; 189 argv += optind; 190 191#define BADTYPE(type) \ 192 (strcmp(type, FSTAB_RO) && \ 193 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 194 195 rval = 0; 196 switch (argc) { 197 case 0: 198 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 199 err(1, "getmntinfo"); 200 if (all) { 201 while ((fs = getfsent()) != NULL) { 202 if (BADTYPE(fs->fs_type)) 203 continue; 204 if (checkvfsname(fs->fs_vfstype, vfslist)) 205 continue; 206 if (hasopt(fs->fs_mntops, "noauto")) 207 continue; 208 if (!(init_flags & MNT_UPDATE) && 209 ismounted(fs, mntbuf, mntsize)) 210 continue; 211 if (mountfs(fs->fs_vfstype, fs->fs_spec, 212 fs->fs_file, init_flags, options, 213 fs->fs_mntops)) 214 rval = 1; 215 } 216 } else if (fstab_style) { 217 for (i = 0; i < mntsize; i++) { 218 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 219 continue; 220 putfsent(&mntbuf[i]); 221 } 222 } else { 223 for (i = 0; i < mntsize; i++) { 224 if (checkvfsname(mntbuf[i].f_fstypename, 225 vfslist)) 226 continue; 227 prmount(&mntbuf[i]); 228 } 229 } 230 exit(rval); 231 case 1: 232 if (vfslist != NULL) 233 usage(); 234 235 if (init_flags & MNT_UPDATE) { 236 mntfromname = NULL; 237 have_fstab = 0; 238 if ((mntbuf = getmntpt(*argv)) == NULL) 239 errx(1, "not currently mounted %s", *argv); 240 /* 241 * Only get the mntflags from fstab if both mntpoint 242 * and mntspec are identical. Also handle the special 243 * case where just '/' is mounted and 'spec' is not 244 * identical with the one from fstab ('/dev' is missing 245 * in the spec-string at boot-time). 246 */ 247 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 248 if (strcmp(fs->fs_spec, 249 mntbuf->f_mntfromname) == 0 && 250 strcmp(fs->fs_file, 251 mntbuf->f_mntonname) == 0) { 252 have_fstab = 1; 253 mntfromname = mntbuf->f_mntfromname; 254 } else if (argv[0][0] == '/' && 255 argv[0][1] == '\0') { 256 fs = getfsfile("/"); 257 have_fstab = 1; 258 mntfromname = fs->fs_spec; 259 } 260 } 261 if (have_fstab) { 262 options = update_options(options, fs->fs_mntops, 263 mntbuf->f_flags); 264 } else { 265 mntfromname = mntbuf->f_mntfromname; 266 options = update_options(options, NULL, 267 mntbuf->f_flags); 268 } 269 rval = mountfs(mntbuf->f_fstypename, mntfromname, 270 mntbuf->f_mntonname, init_flags, options, 0); 271 break; 272 } 273 rmslashes(*argv, *argv); 274 if ((fs = getfsfile(*argv)) == NULL && 275 (fs = getfsspec(*argv)) == NULL) 276 errx(1, "%s: unknown special file or file system", 277 *argv); 278 if (BADTYPE(fs->fs_type)) 279 errx(1, "%s has unknown file system type", 280 *argv); 281 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 282 init_flags, options, fs->fs_mntops); 283 break; 284 case 2: 285 /* 286 * If -t flag has not been specified, the path cannot be 287 * found, spec contains either a ':' or a '@', then assume 288 * that an NFS file system is being specified ala Sun. 289 * Check if the hostname contains only allowed characters 290 * to reduce false positives. IPv6 addresses containing 291 * ':' will be correctly parsed only if the separator is '@'. 292 * The definition of a valid hostname is taken from RFC 1034. 293 */ 294 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL) || 295 ((ep = strchr(argv[0], ':')) != NULL)) { 296 if (*ep == '@') { 297 cp = ep + 1; 298 ep = cp + strlen(cp); 299 } else 300 cp = argv[0]; 301 while (cp != ep) { 302 if (!isdigit(*cp) && !isalpha(*cp) && 303 *cp != '.' && *cp != '-' && *cp != ':') 304 break; 305 cp++; 306 } 307 if (cp == ep) 308 vfstype = "nfs"; 309 } 310 rval = mountfs(vfstype, 311 argv[0], argv[1], init_flags, options, NULL); 312 break; 313 default: 314 usage(); 315 /* NOTREACHED */ 316 } 317 318 /* 319 * If the mount was successfully, and done by root, tell mountd the 320 * good news. Pid checks are probably unnecessary, but don't hurt. 321 */ 322 if (rval == 0 && getuid() == 0 && 323 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 324 if (fscanf(mountdfp, "%d", &pid) == 1 && 325 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 326 err(1, "signal mountd"); 327 (void)fclose(mountdfp); 328 } 329 330 exit(rval); 331} 332 333int 334ismounted(fs, mntbuf, mntsize) 335 struct fstab *fs; 336 struct statfs *mntbuf; 337 int mntsize; 338{ 339 int i; 340 341 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 342 /* the root file system can always be remounted */ 343 return (0); 344 345 for (i = mntsize - 1; i >= 0; --i) 346 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 347 (!isremountable(fs->fs_vfstype) || 348 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 349 return (1); 350 return (0); 351} 352 353int 354isremountable(vfsname) 355 const char *vfsname; 356{ 357 const char **cp; 358 359 for (cp = remountable_fs_names; *cp; cp++) 360 if (strcmp(*cp, vfsname) == 0) 361 return (1); 362 return (0); 363} 364 365int 366hasopt(mntopts, option) 367 const char *mntopts, *option; 368{ 369 int negative, found; 370 char *opt, *optbuf; 371 372 if (option[0] == 'n' && option[1] == 'o') { 373 negative = 1; 374 option += 2; 375 } else 376 negative = 0; 377 optbuf = strdup(mntopts); 378 found = 0; 379 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 380 if (opt[0] == 'n' && opt[1] == 'o') { 381 if (!strcasecmp(opt + 2, option)) 382 found = negative; 383 } else if (!strcasecmp(opt, option)) 384 found = !negative; 385 } 386 free(optbuf); 387 return (found); 388} 389 390int 391mountfs(vfstype, spec, name, flags, options, mntopts) 392 const char *vfstype, *spec, *name, *options, *mntopts; 393 int flags; 394{ 395 /* List of directories containing mount_xxx subcommands. */ 396 static const char *edirs[] = { 397 _PATH_SBIN, 398 _PATH_USRSBIN, 399 NULL 400 }; 401 const char *argv[100], **edir; 402 struct statfs sf; 403 pid_t pid; 404 int argc, i, status; 405 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 406 407#if __GNUC__ 408 (void)&optbuf; 409 (void)&name; 410#endif 411 412 /* resolve the mountpoint with realpath(3) */ 413 (void)checkpath(name, mntpath); 414 name = mntpath; 415 416 if (mntopts == NULL) 417 mntopts = ""; 418 if (options == NULL) { 419 if (*mntopts == '\0') { 420 options = "rw"; 421 } else { 422 options = mntopts; 423 mntopts = ""; 424 } 425 } 426 optbuf = catopt(strdup(mntopts), options); 427 428 if (strcmp(name, "/") == 0) 429 flags |= MNT_UPDATE; 430 if (flags & MNT_FORCE) 431 optbuf = catopt(optbuf, "force"); 432 if (flags & MNT_RDONLY) 433 optbuf = catopt(optbuf, "ro"); 434 /* 435 * XXX 436 * The mount_mfs (newfs) command uses -o to select the 437 * optimization mode. We don't pass the default "-o rw" 438 * for that reason. 439 */ 440 if (flags & MNT_UPDATE) 441 optbuf = catopt(optbuf, "update"); 442 443 /* Compatibility glue. */ 444 if (strcmp(vfstype, "msdos") == 0) 445 vfstype = "msdosfs"; 446 447 argc = 0; 448 argv[argc++] = vfstype; 449 mangle(optbuf, &argc, argv); 450 argv[argc++] = spec; 451 argv[argc++] = name; 452 argv[argc] = NULL; 453 454 if (debug) { 455 (void)printf("exec: mount_%s", vfstype); 456 for (i = 1; i < argc; i++) 457 (void)printf(" %s", argv[i]); 458 (void)printf("\n"); 459 return (0); 460 } 461 462 switch (pid = fork()) { 463 case -1: /* Error. */ 464 warn("fork"); 465 free(optbuf); 466 return (1); 467 case 0: /* Child. */ 468 if (strcmp(vfstype, "ufs") == 0) 469 exit(mount_ufs(argc, (char * const *) argv)); 470 471 /* Go find an executable. */ 472 for (edir = edirs; *edir; edir++) { 473 (void)snprintf(execname, 474 sizeof(execname), "%s/mount_%s", *edir, vfstype); 475 execv(execname, (char * const *)argv); 476 } 477 if (errno == ENOENT) { 478 int len = 0; 479 char *cp; 480 for (edir = edirs; *edir; edir++) 481 len += strlen(*edir) + 2; /* ", " */ 482 if ((cp = malloc(len)) == NULL) 483 errx(1, "malloc failed"); 484 cp[0] = '\0'; 485 for (edir = edirs; *edir; edir++) { 486 strcat(cp, *edir); 487 if (edir[1] != NULL) 488 strcat(cp, ", "); 489 } 490 warn("exec mount_%s not found in %s", vfstype, cp); 491 } 492 exit(1); 493 /* NOTREACHED */ 494 default: /* Parent. */ 495 free(optbuf); 496 497 if (waitpid(pid, &status, 0) < 0) { 498 warn("waitpid"); 499 return (1); 500 } 501 502 if (WIFEXITED(status)) { 503 if (WEXITSTATUS(status) != 0) 504 return (WEXITSTATUS(status)); 505 } else if (WIFSIGNALED(status)) { 506 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 507 return (1); 508 } 509 510 if (verbose) { 511 if (statfs(name, &sf) < 0) { 512 warn("statfs %s", name); 513 return (1); 514 } 515 if (fstab_style) 516 putfsent(&sf); 517 else 518 prmount(&sf); 519 } 520 break; 521 } 522 523 return (0); 524} 525 526void 527prmount(sfp) 528 struct statfs *sfp; 529{ 530 int flags; 531 struct opt *o; 532 struct passwd *pw; 533 534 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 535 sfp->f_fstypename); 536 537 flags = sfp->f_flags & MNT_VISFLAGMASK; 538 for (o = optnames; flags && o->o_opt; o++) 539 if (flags & o->o_opt) { 540 (void)printf(", %s", o->o_name); 541 flags &= ~o->o_opt; 542 } 543 if (sfp->f_owner) { 544 (void)printf(", mounted by "); 545 if ((pw = getpwuid(sfp->f_owner)) != NULL) 546 (void)printf("%s", pw->pw_name); 547 else 548 (void)printf("%d", sfp->f_owner); 549 } 550 if (verbose) { 551 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 552 (void)printf(", writes: sync %ld async %ld", 553 sfp->f_syncwrites, sfp->f_asyncwrites); 554 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 555 (void)printf(", reads: sync %ld async %ld", 556 sfp->f_syncreads, sfp->f_asyncreads); 557 } 558 (void)printf(")\n"); 559} 560 561struct statfs * 562getmntpt(name) 563 const char *name; 564{ 565 struct statfs *mntbuf; 566 int i, mntsize; 567 568 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 569 for (i = mntsize - 1; i >= 0; i--) { 570 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 571 strcmp(mntbuf[i].f_mntonname, name) == 0) 572 return (&mntbuf[i]); 573 } 574 return (NULL); 575} 576 577char * 578catopt(s0, s1) 579 char *s0; 580 const char *s1; 581{ 582 size_t i; 583 char *cp; 584 585 if (s1 == NULL || *s1 == '\0') 586 return s0; 587 588 if (s0 && *s0) { 589 i = strlen(s0) + strlen(s1) + 1 + 1; 590 if ((cp = malloc(i)) == NULL) 591 errx(1, "malloc failed"); 592 (void)snprintf(cp, i, "%s,%s", s0, s1); 593 } else 594 cp = strdup(s1); 595 596 if (s0) 597 free(s0); 598 return (cp); 599} 600 601void 602mangle(options, argcp, argv) 603 char *options; 604 int *argcp; 605 const char **argv; 606{ 607 char *p, *s; 608 int argc; 609 610 argc = *argcp; 611 for (s = options; (p = strsep(&s, ",")) != NULL;) 612 if (*p != '\0') { 613 if (*p == '-') { 614 argv[argc++] = p; 615 p = strchr(p, '='); 616 if (p) { 617 *p = '\0'; 618 argv[argc++] = p+1; 619 } 620 } else if (strcmp(p, "rw") != 0) { 621 argv[argc++] = "-o"; 622 argv[argc++] = p; 623 } 624 } 625 626 *argcp = argc; 627} 628 629 630char * 631update_options(opts, fstab, curflags) 632 char *opts; 633 char *fstab; 634 int curflags; 635{ 636 char *o, *p; 637 char *cur; 638 char *expopt, *newopt, *tmpopt; 639 640 if (opts == NULL) 641 return strdup(""); 642 643 /* remove meta options from list */ 644 remopt(fstab, MOUNT_META_OPTION_FSTAB); 645 remopt(fstab, MOUNT_META_OPTION_CURRENT); 646 cur = flags2opts(curflags); 647 648 /* 649 * Expand all meta-options passed to us first. 650 */ 651 expopt = NULL; 652 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 653 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 654 expopt = catopt(expopt, fstab); 655 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 656 expopt = catopt(expopt, cur); 657 else 658 expopt = catopt(expopt, o); 659 } 660 free(cur); 661 free(opts); 662 663 /* 664 * Remove previous contradictory arguments. Given option "foo" we 665 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 666 * and "foo" - so we can deal with possible options like "notice". 667 */ 668 newopt = NULL; 669 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 670 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 671 errx(1, "malloc failed"); 672 673 strcpy(tmpopt, "no"); 674 strcat(tmpopt, o); 675 remopt(newopt, tmpopt); 676 free(tmpopt); 677 678 if (strncmp("no", o, 2) == 0) 679 remopt(newopt, o+2); 680 681 newopt = catopt(newopt, o); 682 } 683 free(expopt); 684 685 return newopt; 686} 687 688void 689remopt(string, opt) 690 char *string; 691 const char *opt; 692{ 693 char *o, *p, *r; 694 695 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 696 return; 697 698 r = string; 699 700 for (p = string; (o = strsep(&p, ",")) != NULL;) { 701 if (strcmp(opt, o) != 0) { 702 if (*r == ',' && *o != '\0') 703 r++; 704 while ((*r++ = *o++) != '\0') 705 ; 706 *--r = ','; 707 } 708 } 709 *r = '\0'; 710} 711 712void 713usage() 714{ 715 716 (void)fprintf(stderr, "%s\n%s\n%s\n", 717"usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 718" mount [-adfpruvw] [ -F fstab] [-t ufs | external_type]", 719" mount [-dfpruvw] special | node"); 720 exit(1); 721} 722 723void 724putfsent(ent) 725 const struct statfs *ent; 726{ 727 struct fstab *fst; 728 char *opts; 729 730 opts = flags2opts(ent->f_flags); 731 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 732 ent->f_fstypename, opts); 733 free(opts); 734 735 if ((fst = getfsspec(ent->f_mntfromname))) 736 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 737 else if ((fst = getfsfile(ent->f_mntonname))) 738 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 739 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 740 if (strcmp(ent->f_mntonname, "/") == 0) 741 printf("\t1 1\n"); 742 else 743 printf("\t2 2\n"); 744 } else 745 printf("\t0 0\n"); 746} 747 748 749char * 750flags2opts(flags) 751 int flags; 752{ 753 char *res; 754 755 res = NULL; 756 757 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 758 759 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 760 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 761 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 762 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 763 if (flags & MNT_UNION) res = catopt(res, "union"); 764 if (flags & MNT_ASYNC) res = catopt(res, "async"); 765 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 766 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 767 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 768 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 769 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 770 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 771 if (flags & MNT_ACLS) res = catopt(res, "acls"); 772 773 return res; 774} 775